| Starter | Tm | Tier | Game |
|---|---|---|---|
| Brandon Maurer | SEA | -4.35 | 201309230_KCA_SEA |
| Aaron Harang | NYN | -4.06 | 201309230_NYN_CIN |
| Mike Pelfrey | MIN | -3.41 | 201309230_DET_MIN |
| Jordan Lyles | HOU | -2.63 | 201309230_HOU_TEX |
| Roy Halladay | PHI | -2.31 | 201309230_PHI_MIA |
Based on accumulated WAA for this season up to 2013-09-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +002+ | 10.75 | Clayton Kershaw | 230 | LAN |
| +017+ | 5.37 | Clay Buchholz | 101.3 | BOS |
| +019+ | 5.32 | Bartolo Colon | 184.3 | OAK |
| +020+ | 5.28 | Madison Bumgarner | 201.3 | SFN |
| +027+ | 4.98 | Anibal Sanchez | 177 | DET |
| +028+ | 4.94 | Yu Darvish | 198.7 | TEX |
| +029+ | 4.91 | Cliff Lee | 214.7 | PHI |
| +030+ | 4.84 | Zack Greinke | 171.7 | LAN |
| +033+ | 4.7 | Adam Wainwright | 236.3 | SLN |
| +039+ | 4.38 | Chris Sale | 209 | CHA |
| +042+ | 4.18 | Travis Wood | 199 | CHN |
| +045+ | 4.13 | Max Scherzer | 207.3 | DET |
| +049+ | 3.94 | Felix Hernandez | 198.3 | SEA |
| +053+ | 3.59 | Stephen Strasburg | 176 | WAS |
| +058+ | 3.5 | James Shields | 221.7 | KCA |
| +062+ | 3.46 | Ervin Santana | 205 | KCA |
| +063+ | 3.43 | Francisco Liriano | 156 | PIT |
| +065+ | 3.4 | Jordan Zimmermann | 206.3 | WAS |
| +068+ | 3.36 | Hiroki Kuroda | 195.7 | NYA |
| +067+ | 3.36 | Julio Teheran | 180.7 | ATL |
| +073+ | 3.25 | Andrew Cashner | 175 | SDN |
| +074+ | 3.21 | Jhoulys Chacin | 193.3 | COL |
| +078+ | 3.11 | Mike Minor | 198.7 | ATL |
| +081+ | 3.06 | Alex Cobb | 136.3 | TBA |
| +082+ | 3.05 | Mat Latos | 203.7 | CIN |
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